PartsTable
Technical Data Sheet
99821 ✓ Verified by PartsTable
· BOLT SCREW
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 RING,RETAINER is a the manufacturer industrial component. Key specifications include tip_type: PHILLIPS CROSS, head_style: BINDING, head_height: 0.048 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.197 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN, thread_length: 0.312 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-038-2837, 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
99821
NSN: 5305-00-038-2837
FSC: 5305
CAGE: 06650 — BELL AND HOWELL PHILLIPSBURG CO CORPORATE OFFICES (USA)
SPECIFICATIONS
tip_typePHILLIPS CROSS
head_styleBINDING
head_height0.048 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.197 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN
thread_length0.312 INCHES MAXIMUM IN
overall_length3.875 INCHES NOMINAL IN
screw_materialSTEEL COMP 303
fastener_length0.312 INCHES NOMINAL IN
drive_shank_typeMALE STRAIGHT ROUND CENTER, FLATTED ON TWO SIDES
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
NSN5305-00-038-2837
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 99821 · 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: 0.048 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN
HEAD STYLE: BINDING
THREAD DIRECTION: RIGHT-HAND
FASTENER LENGTH: 0.312 INCHES NOMINAL IN
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-12011 MIL SPEC SINGLE TREATMENT RESPONSE
THREAD QUANTITY PER INCH: 48
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
NOMINAL THREAD DIAMETER: 0.099 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
HEAD HEIGHT0.048 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN
HEAD STYLEBINDING
THREAD DIRECTIONRIGHT-HAND
FASTENER LENGTH0.312 INCHES NOMINAL IN
SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-12011 MIL SPEC SINGLE TREATMENT RESPONSE
THREAD QUANTITY PER INCH48
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
NOMINAL THREAD DIAMETER0.099 INCHES IN
SCREW MATERIALSTEEL COMP 303
SCREW MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
99821Interchangeable
interchangeable cross-reference
interchangeable
3-737Interchangeable
interchangeable cross-reference
interchangeable
TMT-99-821Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 99821?
99821 is a RING,RETAINER.
What parts can replace 99821?
There are 3 known substitutes for 99821: 99821, 3-737, TMT-99-821. Substitute compatibility should be verified for your specific system.
What is the NSN for 99821?
99821 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-038-2837. This indicates validated use in U.S. government and defense supply chains.
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