The Screw,close Tolerance, cataloged under National Stock Number 5305-01-006-2736, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 18 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-006-2736 |
| Primary Part Number | HT4025L4-8 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Fastener Length | 0.704 INCHES MINIMUM AND 0.734 INCHES MAXIMUM IN |
| Thread Length | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE 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 CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.497 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 |
|---|---|
| HT4025L4-8 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M454-4L8 | Heartland Precision Fasteners Inc (USA) |
| HT4025L4-8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 11905-4L8 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M454-4LB | Houston Precision Fasteners I Lp (USA) |
| ST3M454-4LB | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HT4025L4-8 | Satair A/s (DNK) |
| WC4025L-4-8 | West Coast Aerospace, Inc. (USA) |
| HT4025L4-8 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HT4025L4-8 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4025L4-8 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4025L4-8 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4025L4-8 | Huck International, Inc (USA) |
| ST3M454-4L8 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M454-4L8 PRIMARY | The Boeing Company Div Defense (USA) |
| HT4025L4-8 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| ST3M454-4L8 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4025L4-8 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4025L4-8 | 5/9 Secondary reference U.S. Government activity |
| 10114818 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4025L4-8 | 3/2 Design control — primary reference U.S. Government activity |
| HT4025L4-8 | 5/9 Secondary reference Sps Technologies Inc |
| HT4025L4-8 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-006-2736 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-006-2736 has 18 manufacturer part numbers on file: HT4025L4-8 (Sps Technologies Ltd, Tj Brooks Division), ST3M454-4L8 (Heartland Precision Fasteners Inc), HT4025L4-8 (Howmet Global Fastening Systems Inc), 11905-4L8 (Reid Products Inc. Dba Reid Products Inc), ST3M454-4LB (Houston Precision Fasteners I Lp) and 13 more.
Key specifications for HT4025L4-8: Fastener Length: 0.704 INCHES MINIMUM AND 0.734 INCHES MAXIMUM IN; Thread Length: 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.250 INCHES IN; Head Style: FLAT COUNTERSUNK. 15 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.