Nuts and Washers - Singapore (SG)
Federal Supply Class (FSC): 5310
NATO Supply Classification Class (NSC): 5310
Federal Supply Group (FSG): 53 Hardware and Abrasives
NATO Supply Classification Group (NSG): 53 Hardware and Abrasives
Items Managed by Singapore (SG) - NCB is 32
Page 3 of 3
NSN Format for Nuts and Washers
Codified by Singapore
| 53 | 10 | 32 | XXX | XXXX | |||
|---|---|---|---|---|---|---|---|
| Group FSG | Class | NCB | Identifier | ||||
| FSC Federal Supply Class | NIIN | ||||||
| NSN | |||||||
NATO Supply Class 5310 is a classification within NATO Supply Group 53, which is dedicated to Hardware And Abrasives. Specifically, Class 5310 pertains to Nuts And Washers.
Nuts and washers are essential components in various mechanical and construction applications. They are used to secure and fasten different parts together, providing stability and preventing loosening or disassembly.
In the NATO supply system, Class 5310 includes a wide range of nuts and washers, such as:
1. Nuts: These are typically hexagonal or square-shaped metal fasteners with a threaded hole in the center. Nuts are used in conjunction with bolts or screws to create a secure joint. They come in various sizes, materials, and thread types to accommodate different applications.
2. Washers: Washers are flat, thin discs with a hole in the center. They are placed between the nut and the surface being fastened to distribute the load and prevent damage to the surface. Washers can also be used to provide insulation, reduce friction, or act as spacers.
NATO Supply Class 5310 ensures that the nuts and washers meet specific quality and performance standards required by NATO member countries. These standards may include factors such as material composition, strength, corrosion resistance, and dimensional specifications.
When procuring nuts and washers within NATO Supply Class 5310, it is important to consider the specific requirements of the application, such as the type of material being fastened, the load-bearing capacity needed, and any environmental factors that may affect the performance of the fasteners.
Overall, NATO Supply Class 5310 plays a crucial role in ensuring the availability of high-quality nuts and washers for military and defense-related applications within NATO member countries.

Includes Locknuts; Eye Nuts; Plain Nuts; Castellated Nuts; Wing Nuts; Plate Nuts; Push on Nuts; Concave and Convex Washers; Flat Washers; Keyed Washers; Lock Washers; Shouldered Washers; Split Washers.
Excludes Bearing Thrust Washers (FSC 3120); Shims (FSC 5365); Ring Spacers (FSC 5365); Plate Spacers (FSC 5365); Lock Rings (FSC 5365).
Frequently Asked Questions(FAQ) for Federal Supply Class 5310
- What is Federal Supply Class 5310?
- FSC 5310 is the Federal Supply Class (formally known as NATO Supply Classification Class NSC 5310) in the USA for supply items codified in the category of Nuts and Washers.
- What is NATO Supply Classification Class 5310?
- NSC 5310 is the NATO Supply Classification Class (also known as Federal Supply Class FSC 5310 in the USA) for supply items codified in the category of Nuts and Washers.
- Which Federal Supply Group is FSC 5310 in?
- FSC 5310 is in Federal Supply Group (FSG) 53 which contains Hardware and Abrasives.
- Which NATO Supply Classification Group is NSC 5310 in?
- NSC 5310 is in NATO Supply Classification Group (NSG) 53 which contains Hardware and Abrasives.
Supply Items Included in Federal Supply Class 5310
- What is a Hexagon Plain Nut? 172 Items
- A Hexagon Plain Nut (NUT,PLAIN,HEXAGON) is a nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see LOCKNUT, ELECTRICAL CONDUIT. See also LOCKNUT, TUBE FITTING. For items having a thickness (or height) exceeding two times the width across the flats, use POST, ELECTRICAL-MECHANICAL EQUIPMENT. (When height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
- What is a Key Washer? 21 Items
- A Key Washer (WASHER,KEY) is a washer of nonresilient material usually having two parallel bearing surfaces. The outside and/or inside edges have one or more protuberances. The ends and/or edges may be prebent at any angle or the protuberances may be prebent at any angle to the bearing surfaces. The keys or lugs may be fitted into keyways in adjacent material or they may be bent over after application to hold or lock one or more items in place. Excludes thrust type washer.
- What is a Hexagon Self-Locking Nut? 75 Items
- A Hexagon Self-Locking Nut (NUT,SELF-LOCKING,HEXAGON) is a nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes NUT (1), SELF-LOCKING, CAP.
- What is a Flat Washer? 273 Items
- A Flat Washer (WASHER,FLAT) is a washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use SHIM. For items fabricated from ceramic or electrically rated materials by specification or industry standards use INSULATOR (1), WASHER. Excludes DISK, VALVE, graphite impregnated and lubricated items.
- What is a Lock Washer? 146 Items
- A Lock Washer (WASHER,LOCK) is a washer which is usually round with a centrally located hole. Its edges and two bearing surfaces are so designed that applied pressure brings into play the spring tension and/or frictional locking principle which materially resists any tendency toward turning. It may be made of one or two pieces
- What is a Round Plain Nut? 21 Items
- A Round Plain Nut (NUT,PLAIN,ROUND) is a nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use POST, ELECTRICAL-MECHANICAL EQUIPMENT. See also NUT (1), PLAIN, KNURLED. (When height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
- What is a Spring Tension Washer? 35 Items
- A Spring Tension Washer (WASHER,SPRING TENSION) is a bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.
Stock Items From Supply Class 5310 Page 3 of 3
- 320813253
- 337-023864-C
- RNCC: 3 | RNVC: 2
- 320195973
- NO PRIMARY REF 32-019-5973
- RNCC: 3 | RNVC: 2
- P/120H/04/04
- RNCC: 5 | RNVC: 2
- P/120H/04/04
- RNCC: 5 | RNVC: 9
- 320849739
- 0151328016
- RNCC: 3 | RNVC: 2
- 320613129
- LAV 328
- RNCC: 3 | RNVC: 2
- 320346881
- 702205
- RNCC: 3 | RNVC: 2
- 320738631
- 702566
- RNCC: 3 | RNVC: 2
- 320197892
- NO PRIMARY REF 32-019-7892
- RNCC: 3 | RNVC: 2
- AER087
- RNCC: 5 | RNVC: 2
- AER087
- RNCC: 5 | RNVC: 9
- 320784849
- LCB 589
- RNCC: 3 | RNVC: 2
- LCB 589
- RNCC: 8 | RNVC: 2
- 320695286
- NO PRIMARY REF 32-069-5286
- RNCC: 3 | RNVC: 2
- 337-023596-Z
- RNCC: 5 | RNVC: 2
- 337-023596-Z
- RNCC: 5 | RNVC: 9
- 320341966
- NO PRIMARY REF 32-034-1966
- RNCC: 3 | RNVC: 2
- 702530
- RNCC: 5 | RNVC: 2
- 320774476
- NO PRIMARY REF 32-077-4476
- RNCC: 3 | RNVC: 2
- H2070-53132-00
- RNCC: 5 | RNVC: 2
- 320639848
- 11-31-101/20
- RNCC: 3 | RNVC: 2
- M11-31-101
- RNCC: 7 | RNVC: 1
- 320016826
- P/120MS/06/16
- RNCC: 5 | RNVC: 2
- P/120MS/06/16
- RNCC: 5 | RNVC: 9
- 320341996
- NO PRIMARY REF 32-034-1996
- RNCC: 3 | RNVC: 2
- 600056
- RNCC: 5 | RNVC: 2
- 320800908
- NO PRIMARY REF 32-080-0908
- RNCC: 3 | RNVC: 2
- 0.190-32
- RNCC: 5 | RNVC: 2
- 320778642
- SNT.D340.14B
- RNCC: 3 | RNVC: 2
- 320224331
- NO PRIMARY REF 32-022-4331
- RNCC: 3 | RNVC: 2
- ODE 10485165
- RNCC: 5 | RNVC: 2
- ODE 10485165
- RNCC: 5 | RNVC: 9
- 320392412
- 05-0004-11/7
- RNCC: 3 | RNVC: 2
- 320613588
- LAK 403
- RNCC: 3 | RNVC: 2
- 320786658
- 9320-R28-07
- RNCC: 3 | RNVC: 2
- 320341998
- NO PRIMARY REF 32-034-1998
- RNCC: 3 | RNVC: 2
- 700070
- RNCC: 5 | RNVC: 2
- 320169644
- ZP1270-7-014
- RNCC: 3 | RNVC: 2
- 320737449
- NO PRIMARY REF 32-073-7449
- RNCC: 3 | RNVC: 2
- P/CMG/06/1/12
- RNCC: 5 | RNVC: 2
- P/CMG/06/1/12
- RNCC: 5 | RNVC: 9
- 320330507
- NO PRIMARY REF 32-033-0507
- RNCC: 3 | RNVC: 2
- P/84RCL/04/29
- RNCC: 5 | RNVC: 2
- P/84RCL/04/29
- RNCC: 5 | RNVC: 9
- 320804866
- 335-150167-F
- RNCC: 3 | RNVC: 2
- 320193980
- NO PRIMARY REF 32-019-3980
- RNCC: 3 | RNVC: 2
- 401176
- RNCC: 5 | RNVC: 2
- 320330506
- NO PRIMARY REF 32-033-0506
- RNCC: 3 | RNVC: 2
- P/84RCL/04/28
- RNCC: 5 | RNVC: 2
- P/84RCL/04/28
- RNCC: 5 | RNVC: 9
- 320611637
- SNT.D285.1C1
- RNCC: 3 | RNVC: 2
- 320169590
- ZP1270-2-003
- RNCC: 3 | RNVC: 2
- 320196967
- NO PRIMARY REF 32-019-6967
- RNCC: 3 | RNVC: 2
- P/32A1/03/04
- RNCC: 5 | RNVC: 2
- P/32A1/03/04
- RNCC: 5 | RNVC: 9
- 320016903
- P/120MS/03/12
- RNCC: 5 | RNVC: 2
- P/120MS/03/12
- RNCC: 5 | RNVC: 9
- 320016828
- P/120MS/06/19
- RNCC: 5 | RNVC: 2
- P/120MS/06/19
- RNCC: 5 | RNVC: 9
- 320680494
- NO PRIMARY REF 32-068-0494
- RNCC: 3 | RNVC: 2
- 11205 10100
- RNCC: 5 | RNVC: 2
- 320197894
- NO PRIMARY REF 32-019-7894
- RNCC: 3 | RNVC: 2
- AER089
- RNCC: 5 | RNVC: 2
- AER089
- RNCC: 5 | RNVC: 9
- 320169637
- ZP1270-7-007
- RNCC: 3 | RNVC: 2
- 320796147
- 337-053154-C
- RNCC: 3 | RNVC: 2
- 320208225
- 11213 03030
- RNCC: 3 | RNVC: 2
- 01010 00242
- RNCC: 5 | RNVC: 9
- SAF-DR-N-0207
- RNCC: 7 | RNVC: 1
- 320804859
- 335-150169-B
- RNCC: 3 | RNVC: 2
- 320657822
- E9007-90/20-032
- RNCC: 3 | RNVC: 2
- 320778800
- SWA.D600.15A
- RNCC: 3 | RNVC: 2
- 320169634
- ZP1270-7-004
- RNCC: 3 | RNVC: 2
- 320613594
- LAK 320
- RNCC: 3 | RNVC: 2
- 320685989
- 335-150313-J
- RNCC: 3 | RNVC: 2
- 335-150313-J
- RNCC: 5 | RNVC: 9
- 320332099
- LAB 179
- RNCC: 3 | RNVC: 2
- 320195968
- NO PRIMARY REF 32-019-5968
- RNCC: 3 | RNVC: 2
- P/120H/03/13
- RNCC: 5 | RNVC: 2
- P/120H/03/13
- RNCC: 5 | RNVC: 9
- 320675847
- 5608-8000-0001
- RNCC: 3 | RNVC: 2
- 5608-8000-0001
- RNCC: 3 | RNVC: 2
- 5608-8000-0001
- RNCC: 5 | RNVC: 9
- 320675852
- 5705-8000-0007
- RNCC: 3 | RNVC: 2
- 5705-8000-0007
- RNCC: 3 | RNVC: 2
- 5705-8000-0007
- RNCC: 5 | RNVC: 9
- 320806384
- SWA.D515.14.A2R
- RNCC: 3 | RNVC: 2
- 320437911
- P/TB/00/02-13
- RNCC: 3 | RNVC: 2
- P/TB/00/02-13
- RNCC: 5 | RNVC: 9
- 320614275
- SWA.D071.1H1.A2A
- RNCC: 3 | RNVC: 2
- SWA.D071.1H1.A2A
- RNCC: 5 | RNVC: 9
- 320788019
- 340-100036-C
- RNCC: 3 | RNVC: 2
- 320748626
- NO PRIMARY REF 32-074-8626
- RNCC: 3 | RNVC: 2
- 310B096
- RNCC: 5 | RNVC: 2
- 310B096
- RNCC: 5 | RNVC: 9
- 320804855
- 335-200167-G
- RNCC: 3 | RNVC: 2
- 320694998
- NO PRIMARY REF 32-069-4998
- RNCC: 3 | RNVC: 2
- 337-020261-B
- RNCC: 5 | RNVC: 2
- 337-020261-B
- RNCC: 5 | RNVC: 9
- 320198583
- NO PRIMARY REF 32-019-8583
- RNCC: 3 | RNVC: 2
- P/120H/06/05
- RNCC: 5 | RNVC: 2
- P/120H/06/05
- RNCC: 5 | RNVC: 9
- 320224268
- NO PRIMARY REF 32-022-4268
- RNCC: 3 | RNVC: 2
- 10287124
- RNCC: 5 | RNVC: 2
- 10287124
- RNCC: 5 | RNVC: 9
- 320729982
- NO PRIMARY REF 32-072-9982
- RNCC: 3 | RNVC: 2
- H2052-46770-00
- RNCC: 5 | RNVC: 2
- 7045-671
- RNCC: 5 | RNVC: 2
- 320342290
- NO PRIMARY REF 32-034-2290
- RNCC: 3 | RNVC: 2
- AB-15-02-516/1
- RNCC: 5 | RNVC: 9
- 320686176
- 01-1008-05
- RNCC: 3 | RNVC: 2
- 320600158
- 310-064701-I
- RNCC: 3 | RNVC: 2
- 310-064701-I
- RNCC: 3 | RNVC: 2
- 310-064701-I
- RNCC: 5 | RNVC: 9
- 320686170
- 54-2108-20
- RNCC: 3 | RNVC: 2
- 320198712
- NO PRIMARY REF 32-019-8712
- RNCC: 3 | RNVC: 2
- P/84RCL/09/01-04
- RNCC: 5 | RNVC: 2
- P/84RCL/09/01-04
- RNCC: 5 | RNVC: 9
- 320079378
- NO PRIMARY REF 32-007-9378
- RNCC: 3 | RNVC: 2
- 400320
- RNCC: 5 | RNVC: 2
- 320824649
- 2000439235
- RNCC: 3 | RNVC: 2
- 320011166
- NO PRIMARY REF 32-001-1166
- RNCC: 3 | RNVC: 2
- 01226C
- RNCC: 5 | RNVC: 9
- 320756140
- 0150112529
- RNCC: 3 | RNVC: 2
- 320640035
- PP-31-1092-08
- RNCC: 3 | RNVC: 2