The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-221-9771, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems Land & Armaments L.p.. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-221-9771 |
| Primary Part Number | 1276-05-293 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Bae Systems Land & Armaments L.p. |
| Status | ACTIVE |
| Extended Washer Thickness | 5.0 MILLIMETERS NOMINAL MM |
| Head Height | 13.0 MILLIMETERS NOMINAL MM |
| Fastener Length | 41.00 MILLIMETERS NOMINAL MM |
| Surface Treatment Document and Classification | QQ-P-416,TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 36.0 MILLIMETERS NOMINAL MM |
| Thread Length | 38.0 MILLIMETERS MINIMUM AND 41.0 MILLIMETERS MAXIMUM MM |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| Hole Configuration Style | HEXAGON LONGITUDINAL HOLE |
| Material Document and Classification | SAE GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 22.0 MILLIMETERS NOMINAL MM |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1536 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL |
| Hole Quantity | 6 |
| Thread Series Designator | M |
| Hole Type | DRILLED |
| Hole Diameter | 2.00 MILLIMETERS NOMINAL MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1276-05-293 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| 5305PL0816579 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5520237 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5305-01-221-9771 is a Screw,cap,hexagon Head, manufactured by Bae Systems Land & Armaments L.p., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-221-9771 has 1 manufacturer part number on file: 1276-05-293 (Bae Systems Land & Armaments L.p.).
Key specifications for 1276-05-293: Extended Washer Thickness: 5.0 MILLIMETERS NOMINAL MM; Head Height: 13.0 MILLIMETERS NOMINAL MM; Fastener Length: 41.00 MILLIMETERS NOMINAL MM; Surface Treatment Document and Classification: QQ-P-416,TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 21 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.