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Technical Data Sheet
PartsTable / MRO / 400-221
400-221 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The TELETYPEWRITER SUBASSEMBLY is a the manufacturer industrial component. Key specifications include overall_width: 2.313 INCHES NOMINAL IN, overall_height: 0.938 INCHES NOMINAL IN, overall_length: 2.781 INCHES NOMINAL IN, special_features: SPROKET 1; CAM CONTROL 1; WHEEL 1, end_item_identification: TELETYPE PRINTER M-40. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-298-7017, 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
MRO→ MRO_GENERAL→ 400-221
NSN: 5325-00-298-7017
FSC: 5325
CAGE: 71286 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV CAMLOC PRODUCTS (USA)
SPECIFICATIONS
overall_width2.313 INCHES NOMINAL IN
overall_height0.938 INCHES NOMINAL IN
overall_length2.781 INCHES NOMINAL IN
special_featuresSPROKET 1; CAM CONTROL 1; WHEEL 1
end_item_identificationTELETYPE PRINTER M-40
NSN5325-00-298-7017
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 400-221 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
•
EYELET LENGTH: 0.257 INCHES NOMINAL IN
•
DIAMETER: 0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
•
MATERIAL: STEEL COMP 4037 STUD
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
EYELET LENGTH0.257 INCHES NOMINAL IN
DIAMETER0.377 INCHES MINIMUM AND 0.384 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE EJECTOR SPRING
MATERIALSTEEL COMP 4037 STUD
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE PIN
MATERIALSTEEL PIN
MATERIALSTEEL COMP 1009 OR STEEL COMP 1050 OR STEEL COMP 1112 EYELET
MATERIALSTEEL EJECTOR SPRING
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
400221Interchangeable
interchangeable cross-reference
interchangeable
H859-3-4SSInterchangeable
interchangeable cross-reference
interchangeable
300-429 ITEM 23Interchangeable
interchangeable cross-reference
interchangeable
201-122 ITEM 4Interchangeable
interchangeable cross-reference
interchangeable
5322 506 50015Interchangeable
interchangeable cross-reference
interchangeable
300-412Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 400-221?
400-221 is a TELETYPEWRITER SUBASSEMBLY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 400-221?
There are 10 known substitutes for 400-221: 400221, H859-3-4SS, 300-429 ITEM 23 and 7 more. Substitute compatibility should be verified for your specific system.
Is 400-221 still available?
400-221 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026