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NAS557-3B — Technical Data Sheet

✓ 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 GROMMET,NONMETALLIC is a the manufacturer industrial component. Key specifications include material: PLASTIC OVERALL, groove_width: 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN, grommet_style: ROUND, hole_diameter: 0.188 INCHES NOMINAL IN, overall_height: 0.219 INCHES NOMINAL IN, flange_thickness: 0.064 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System under NSN 5325-00-584-6624, 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
NAS557-3B
NSN: 5325-00-584-6624
FSC: 5325
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialPLASTIC OVERALL
groove_width0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
grommet_styleROUND
hole_diameter0.188 INCHES NOMINAL IN
overall_height0.219 INCHES NOMINAL IN
flange_thickness0.064 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
groove_outside_diameter0.241 INCHES NOMINAL IN
grommet_construction_typeSPLIT
specification/standard_data80205-NAS557 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
large_flange_outside_diameter0.315 INCHES NOMINAL IN
material_document_and_classificationMIL-M-20693 TY1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5325-00-584-6624
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: NAS557-3B · 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
•
HOLE DIAMETER: 0.188 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.064 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
•
GROOVE OUTSIDE DIAMETER: 0.241 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-M-20693 TY1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
GROMMET STYLE: ROUND
•
SPECIFICATION/STANDARD DATA: 80205-NAS557 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
GROOVE WIDTH: 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
HOLE DIAMETER0.188 INCHES NOMINAL IN
FLANGE THICKNESS0.064 INCHES MINIMUM AND 0.059 INCHES MAXIMUM IN
GROOVE OUTSIDE DIAMETER0.241 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-M-20693 TY1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
GROMMET STYLEROUND
OVERALL HEIGHT0.219 INCHES NOMINAL IN
SPECIFICATION/STANDARD DATA80205-NAS557 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
GROOVE WIDTH0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN
MATERIALPLASTIC OVERALL
COLORNATURAL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
601996InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
K1418InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
12049-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
120A491InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A8862InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
8430181InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS557-3B?
NAS557-3B is a GROMMET,NONMETALLIC.
What parts can replace NAS557-3B?
There are 10 known substitutes for NAS557-3B: 601996, K1418, 12049-1 and 7 more. Substitute compatibility should be verified for your specific system.
Is NAS557-3B still available?
NAS557-3B is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: September 2026