The Screw,close Tolerance, cataloged under National Stock Number 5305-01-025-4855, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 6 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-025-4855 |
| Primary Part Number | HT4017-08-5 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 0.609 INCHES MINIMUM AND 0.639 INCHES MAXIMUM IN |
| Thread Length | 0.287 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Grip Diameter | 0.1630 INCHES MINIMUM AND 0.1635 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNJC |
| Head Diameter | 0.297 INCHES MINIMUM AND 0.302 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 |
|---|---|
| HT4017-08-5 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4017-08-5 PRIMARY | Huck International, Inc (USA) |
| ST3M649-08-5 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| HT4017-08-5 PRIMARY | Hi-Shear Corporation (USA) |
| HT4017-08-5 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4017-08-5 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4017-08-5 | 5/9 Secondary reference U.S. Government activity |
| HT4017-08-5 | 3/2 Design control — primary reference U.S. Government activity |
| HT4017-08-5 | 5/9 Secondary reference U.S. Government activity |
| HT4017-08-5 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M649-08-5 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5305-01-025-4855 is a Screw,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-025-4855 has 6 manufacturer part numbers on file: HT4017-08-5 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), HT4017-08-5 (Huck International, Inc), ST3M649-08-5 (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc), HT4017-08-5 (Hi-Shear Corporation), HT4017-08-5 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 1 more.
Key specifications for HT4017-08-5: Fastener Length: 0.609 INCHES MINIMUM AND 0.639 INCHES MAXIMUM IN; Thread Length: 0.287 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN; Material Document and Classification: AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.164 INCHES IN. 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.