The Screw,close Tolerance, cataloged under National Stock Number 5305-01-129-6932, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-129-6932 |
| Primary Part Number | HT271A5-17 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Head Height | 0.088 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Fastener Length | 1.578 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN |
| Thread Length | 0.506 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN |
| Material Document and Classification | NAS621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | TITANIUM ALLOY UNS R54520 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.629 INCHES MINIMUM AND 0.634 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 |
|---|---|
| HT271A5-17 PRIMARY | Hi-Shear Corporation (USA) |
| 110179-5-17AS | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| BM33024V5-17U PRIMARY | Huck International, Inc (USA) |
| HT8137-5-17AS PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M430V5-17AS | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| HT271A5-17 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M430V5-17AS PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10115201 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| WC8137-5-17A | 5/9 Secondary reference West Coast Aerospace, Inc. |
| ST3M430V5-17AS | 5/9 Secondary reference Fastener Innovation Technology, Inc. Dba F I T |
| ST3M430V5-17AS | 5/2 Secondary reference U.S. Government activity |
| BM33024V5-17U | 5/9 Secondary reference U.S. Government activity |
| HT8137-5-17AS | 5/9 Secondary reference U.S. Government activity |
| 110179-5-17AS | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-129-6932 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-129-6932 has 7 manufacturer part numbers on file: HT271A5-17 (Hi-Shear Corporation), 110179-5-17AS (Sps Technologies Ltd, Tj Brooks Division), BM33024V5-17U (Huck International, Inc), HT8137-5-17AS (Howmet Global Fastening Systems Inc), ST3M430V5-17AS (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc) and 2 more.
Key specifications for HT271A5-17: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.088 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN; Fastener Length: 1.578 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN. 18 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.