Technical Library
Common problems in fastener design and procurement, addressed from the perspective of a manufacturer with over 50 years in the trade.
A2-50, A2-70, A2-80 — What Is the Difference?
What stainless property classes mean, and how to choose. Why the same STS304 can have different strengths.
A Magnet Sticks to My Stainless Screw. Is It Defective?
Why STS304 parts become magnetic, and why that is not a quality problem.
My Stainless Bolt Seized Halfway In — Galling
The most common failure in stainless fastening. Causes and practical prevention.
Reading a Screw Designation — What M4 × 0.7 × 10 Means
Breaking down the fastener callout on a purchase order or drawing, item by item.
Tightening, Loosening and Breaking Torque
Three different torque values, and a practical basis for how tight is tight enough.
Can You Identify RoHS-Compliant Fasteners by Colour?
The ten restricted substances, and how to judge compliance by surface finish.
볼트는 얼마나 깊이 물려야 하나 — 물림길이와 탭 깊이
모재 재질별 적정 체결 깊이, 나사산 하중 분배의 원리, 막힌구멍 드릴 깊이 계산.
도금은 두꺼울수록 좋을까 — 도금두께와 ISO 4042
도금이 얇으면 녹, 두꺼우면 체결 불량. 허용 두께의 규격 근거와 측정법 3종 비교.
우리는 이렇게 검사합니다 — 인장·비틀림·게이지 검사
로트마다 실시하는 검사 3종의 대상·기준·절차. "측정한 것만 말합니다"의 실체.
십자 드라이버 비트 호환표 — #0부터 #4까지
나사 머리가 뭉개지는 원인의 대부분은 비트 규격 불일치. 호칭경별 맞는 비트 고르기.
Tell us what you need and we will consider adding it. For product-specific technical enquiries, use Contact Us.