5305-99-701-3721
Machine Screw
5305997013721 997013721 A221-B28 A221B28 205021280
An externally threaded fastener whose threaded portion is of one nominal diameter, No 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below No. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; and SCREW, CAP SOCKET HEAD. View more Machine Screw
January 2023
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Approved Sources 5305-99-701-3721
- Part Number
- Manufacturer
- Status
- A221-B28
- Manufacturer
- K7766 - Bsi Standards Limited (Active)
- Definitive Standard
- Definitive Standard
- A221B28
- K4975 - Ufc Aerospace Europe Limited (Active)
- Secondary Buy
- Secondary Buy
- 205021280
- U3222 - Ministry Of Defence, Defence (Active)
- Secondary Buy
- Secondary Buy