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Technical Data Sheet
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19991 — CIRCUIT CARD ASSEMBLY

✓ Government record, cited
Trust · NUT WASHER
PRODUCT OVERVIEW

19991: CIRCUIT CARD ASSEMBLY.

Ultra thin and lightweight design. Stand with multiple viewing angles. Magnetic closure.

Adhesive Stick&Go pad: holds your tablet firmly and creates a clean look. Switch tablet when you like, the Stick&Go pad retains its adhesive strength. Access to connectors and buttons.

Soft inner lining. This part is cataloged in the U.S. Government catalog under NSN 5310-00-019-8151, 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
19991
NSN: 5310-00-019-8151
NIINs: 000198151, 010520608, 014198501, 014476726, 015171056
FSC: 5310 — Nuts and Washers
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.446 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
width_across_flats0.617 INCHES NOMINAL IN
nominal_thread_size0.437 INCHES IN
bearing_surface_typeFLAT
thread_quantity_per_inch20
part_name_assigned_by_controlling_agencyFSC APPLICATION DATA: EARCASE-MOTOR,CONTROL SYSTEM,ACFT
NSN5310-00-019-8151
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 19991 · Trust ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 0.617 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.437 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT
•
NUT HEIGHT: 0.446 INCHES NOMINAL IN
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.617 INCHES NOMINAL IN
THREAD SERIESUNF
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.437 INCHES IN
LOCKING FEATUREPREVAILING TORQUE WITH NONMETALLIC INSERT
NUT HEIGHT0.446 INCHES NOMINAL IN
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH20
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 19991?
19991 is a CIRCUIT CARD ASSEMBLY manufactured by Trust.
What is the NSN for 19991?
19991 is cataloged in the U.S. Government catalog under NSN 5310-00-019-8151. This indicates validated use in U.S. government and defense supply chains.
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