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370-0172 — COLLAR

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

370-0172: COLLAR.

The COLLAR is a the manufacturer industrial component. Key specifications include head_style: FLAT CHAMFER, head_height: 0.074 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.221 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN, thread_length: 0.376 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN, screw_material: STEEL COMP E4340 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OR STEEL COMP 4140 OR STEEL COMP 4037. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-057-1720, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
370-0172
NSN: 5305-00-057-1720
NIINs: 000571720, 010847984
FSC: 5305 — Screws
CAGE: 0117B — AIRBUS DEFENCE AND SPACE SAU (ESP)
SPECIFICATIONS
head_styleFLAT CHAMFER
head_height0.074 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.221 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN
thread_length0.376 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
screw_materialSTEEL COMP E4340 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OR STEEL COMP 4140 OR STEEL COMP 4037
fastener_length0.438 INCHES NOMINAL IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
internal_drive_styleTORQUE SET
nominal_thread_diameter0.138 INCHES IN
screw_surface_treatmentCADMIUM AND CHROMATE
NSN5305-00-057-1720
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 370-0172 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HEAD HEIGHT: 0.074 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: CADMIUM AND CHROMATE
•
FASTENER LENGTH: 0.438 INCHES NOMINAL IN
•
SCREW MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE
•
THREAD LENGTH: 0.376 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
•
HARDNESS RATING: 36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.074 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTCADMIUM AND CHROMATE
FASTENER LENGTH0.438 INCHES NOMINAL IN
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 5TH MATERIAL RESPONSE OR AMS 6300 ASSN STD 6TH MATERIAL RESPONSE
THREAD LENGTH0.376 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM
NOMINAL THREAD DIAMETER0.138 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL COMP E4340 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 OR STEEL COMP 4140 OR STEEL COMP 4037
SUBSTITUTES & CROSS-REFERENCES 2
TS705-06TCRReference document
Same NSN cross-reference
Reference document — Secondary reference
NAS1101-06-7Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 370-0172?
370-0172 is a COLLAR.
What parts can replace 370-0172?
There are 2 known substitutes for 370-0172: TS705-06TCR, NAS1101-06-7. Substitute compatibility should be verified for your specific system.
What is the NSN for 370-0172?
370-0172 is cataloged in the U.S. Government catalog under NSN 5305-00-057-1720. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.