The Screw,close Tolerance, cataloged under National Stock Number 5305-01-110-9771, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 16 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-110-9771 |
| Primary Part Number | 3M925C4-8A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Head Height | 0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Fastener Length | 0.953 INCHES MINIMUM AND 0.983 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488,TYPE2,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.443 INCHES MINIMUM AND 0.493 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 3M925C4-8A PRIMARY | The Boeing Company Div Defense (USA) |
| 3M925C4-8A | Houston Precision Fasteners I Lp (USA) |
| HT4067-4-8A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| 3M925C4-8A | Heartland Precision Fasteners Inc (USA) |
| 3M925C4-8A | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| WC4067-4-8A | West Coast Aerospace, Inc. (USA) |
| 11881C4-8A | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4067-4-8A | Huck International, Inc (USA) |
| HT4067-4-8A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4067-4-8A | Howmet Global Fastening Systems Inc (USA) |
| HT4067-4-8A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4067-4-8A | Hi-Shear Corporation (USA) |
| 3M925C4-8A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4067-4-8A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M925C4-8A | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HT4067-4-8A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| HT4067-4-8A | 5/9 Secondary reference U.S. Government activity |
| CHT4067-4-8A | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| 642AS1631-3 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| CHT4067-4-8A | 5/9 Secondary reference U.S. Government activity |
| WC4067-4-8A | 5/9 Secondary reference Dynaquip Controls Corporation |
| HT4067-4-8A | 5/2 Secondary reference U.S. Government activity |
| 3M925C4-8A | 5/9 Secondary reference Sps Technologies Inc |
| HT4067-4-8A | 5/9 Secondary reference Sps Technologies Inc |
| HT4067-4-8A | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-110-9771 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-110-9771 has 16 manufacturer part numbers on file: 3M925C4-8A (The Boeing Company Div Defense), 3M925C4-8A (Houston Precision Fasteners I Lp), HT4067-4-8A (Sps Technologies Ltd, Tj Brooks Division), 3M925C4-8A (Heartland Precision Fasteners Inc), 3M925C4-8A (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc) and 11 more.
Key specifications for 3M925C4-8A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.071 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Fastener Length: 0.953 INCHES MINIMUM AND 0.983 INCHES MAXIMUM IN. 19 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.